package facadePattern;

/**
 * @author： pang-yun
 * @date： 2021-12-27 16:02
 * 功能目的 ：用于  立体声
 */

public class Stereo {
    private Stereo() {
    }

    private static Stereo instance = new Stereo();

    public static Stereo getInstance() {
        return instance;
    }

    public  void on(){
        System.out.println("Stereo on");
    }

    public void off(){
        System.out.println("Screen off");
    }
}
